Hydraulic cylinder internal wall corrosion monitoring probe and monitoring method

Abstract

The present invention discloses a hydraulic cylinder inner wall corrosion monitoring probe and monitoring method, which relates to the field of hydraulic cylinder corrosion detection devices. The probe and monitoring method include a three-way pipe, with a first end of the three-way pipe connected to a liquid inlet and a second end connected to the hydraulic liquid, a base attached to the third end of the three-way pipe and connected to the third end, a fiber hose connected to the base and the other end extending from the second end into the hydraulic cylinder, a ball hinge and a pull wire attached to the fiber hose, the pull wire extending along the length of the fiber hose through a pull hole in the ball hinge, one end of the pull wire connected to an electric winch set, and a fixed end adjacent to the other end of the fiber hose, and a probe assembly fixedly attached to the other end of the fiber hose. The probe assembly, base, and fiber hose are connected to the hydraulic cylinder via the three-way pipe, and the probe assembly extends along the three-way pipe into the hydraulic cylinder, allowing for real-time detection of corrosion on the hydraulic cylinder inner wall while the hydraulic cylinder is operating, without the need to stop the hydraulic cylinder for detection or normal production.

Description

Technical Field

[0001] The present invention relates to the field of corrosion detection devices for hydraulic cylinders, and particularly to an inner wall corrosion monitoring probe and monitoring method for hydraulic cylinders.

Background Art

[0002] The corrosion problem is one of the main failure forms of hydraulic cylinders, which greatly affects the operating life of hydraulic cylinders. However, at present, the corrosion detection method of hydraulic cylinders still remains at the stage of regular shutdown inspection, with poor timeliness, reduced detection efficiency, and at the same time, it greatly affects the production efficiency. There is an urgent need to propose a method for real-time monitoring of the corrosion of hydraulic cylinders.

[0003] Existing patent number: CN2.2223219437.3 discloses an ultrasonic detection probe part for internal detection of a long-distance transport pipeline, belonging to the field of pipeline ultrasonic internal detection technology, including a probe cabin and a phased array probe provided outside. The phased array probe includes a plurality of ultrasonic probes uniformly arranged along the circumferential direction of the probe cabin pipeline. Each ultrasonic probe covers a certain detection area in the circumferential direction. On the other hand, two adjacent ultrasonic probes are arranged in a staggered pattern along the circumferential direction of the pipeline so that the phased array probe can achieve full coverage of pipeline detection along the circumferential direction. The above device has high integration, short length, small volume, strong passability, and can achieve high detection resolution when the volume is small. It can reduce the requirements for the length of the service tube and the working space, and is easy to implement on-site. However, the above device has limitations when dealing with the high hydraulic operating environment faced by the inside of the hydraulic cylinder during operation. Also, when corresponding to geometric changes in the inner wall of the hydraulic cylinder, its mobility is somewhat limited, and flexible movement and accurate positioning cannot be achieved, making it difficult to meet the need for real-time monitoring of the state of the inner wall of the hydraulic cylinder. This problem is particularly prominent when the inner diameter of the inside of the hydraulic cylinder does not match or there are bends.

[0004] Therefore, providing an ultrasonic probe capable of monitoring corrosion on the inner wall of a hydraulic cylinder is a technical challenge that those skilled in the art should address as soon as possible. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] CN2.2223219437.3 [Overview of the project] [Problems that the invention aims to solve]

[0006] The objective of the present invention is to provide a hydraulic cylinder internal wall corrosion monitoring probe in order to solve the problems of the prior art. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides the following solution: The present invention provides a hydraulic cylinder inner wall corrosion monitoring probe, wherein the hydraulic cylinder communicates with hydraulic fluid via a liquid inlet, A three-way pipe having a first end in communication with the liquid inlet and a second end in communication with the hydraulic fluid, A base is provided at the third end of the three-way pipe, communicating with the third end, and containing a gas adjustment mechanism and a controller, the controller being electrically connected to the electric winch set. A fiber hose having one end communicating with the base and the other end extending from the second end into the hydraulic cylinder, with a ball hinge and multiple towing wires fixedly installed inside, having multiple ball hinges arranged along the length, with the ball hinges penetrating the front and rear surfaces and providing towing holes, the towing wires passing sequentially through the multiple towing holes, one end of which extends into the base and is connected to the electric winch set, and the fixed end of the towing wires provided close to the other end, The system includes a probe assembly, the probe assembly being fixedly attached to the other end of the fiber hose, and the probe assembly being communicated with the controller.

[0008] Furthermore, the probe assembly is A probe housing is fixedly connected to the other end of the fiber hose via a connector, There are multiple phased array ultrasonic probes, which are provided within the probe housing along the circumferential direction, The system includes a data transmission line, one end of which is electrically connected to the phased array ultrasonic probe, and the other end of which is electrically connected to the controller through a hollow axis in the center of a plurality of ball hinges.

[0009] Furthermore, the system further comprises an ultrasonic positioning probe and a hydraulic pressure sensor, the ultrasonic positioning probe and the hydraulic pressure sensor being located at the head of the probe housing and electrically connected to the data transmission line.

[0010] Furthermore, the phased array ultrasonic probe is provided separately from the connector.

[0011] Furthermore, the connector is rotatable.

[0012] Furthermore, the fiber hose is made of polyester fiber material.

[0013] Furthermore, O-ring seals are provided at the connection point between the base and the third end, and at the communication point between the first end and the liquid inlet, and pressure-resistant packing is filled in these seals.

[0014] Furthermore, a dust ring is provided at the connection point between the base and the third end, and at the communication point between the first end and the liquid inlet.

[0015] Furthermore, the present invention provides a method for monitoring corrosion of the inner wall of a hydraulic cylinder, and applies the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe. The steps include adjusting the electric winch set to adjust the tensile force of multiple towing wires, thereby bending the fiber hose and moving the probe assembly into a preset monitoring position within the hydraulic cylinder, A step to confirm whether or not the ultrasonic positioning probe has reached a preset monitoring position, The steps include monitoring the hydraulic pressure in a hydraulic cylinder using a water pressure sensor and adjusting the tensile force of multiple traction wires according to the monitored hydraulic pressure, The process includes detecting the circumferential thickness of the inner wall of a hydraulic cylinder using a phased array ultrasonic probe, transmitting the detected thickness data to a controller in the base via a data transmission line, and the controller uploading the thickness data to a PC terminal for recording and analysis. [Effects of the Invention]

[0016] The present invention discloses the following technical effects.

[0017] 1. The present invention enables real-time detection of corrosion on the inner wall of a hydraulic cylinder. The probe assembly, base, and fiber hose are connected to the hydraulic cylinder via a three-way tube. The probe assembly enters the hydraulic cylinder along the three-way tube, allowing real-time detection of corrosion on the inner wall of the hydraulic cylinder while it is operating. This eliminates the need to stop the hydraulic cylinder, does not affect normal production, and provides an early warning function for corrosion failures in the hydraulic cylinder. Appropriate measures can be taken and maintenance performed before hydraulic cylinder corrosion develops further, indirectly extending the lifespan of the hydraulic cylinder.

[0018] 2. This invention has excellent applicability. For different types and models of hydraulic cylinders, only the size of the three-way pipe and base needs to be changed; other equipment structures do not need to be adjusted.

[0019] 3. By adjusting the tensile force of the traction wire inside the fiber hose, the bending direction and degree of the fiber hose are adjusted so that the fiber hose can adapt to the geometric changes of the inner wall of the hydraulic cylinder, improving the flexibility of the movement of the probe assembly and the accuracy of the movement position, enabling the probe assembly to accurately move to the preset detection position to monitor the corrosion status of the inner wall of the hydraulic cylinder.

[0020] 4. At the connection between the base and the third end of the three-way pipe and the communication part between the first end of the three-way pipe and the liquid inlet of the hydraulic cylinder, dust rings and O-ring seals are provided and filled with pressure-resistant packing, greatly improving the structural strength and pressure resistance of the communication part, preventing hydraulic liquid from leaking when the hydraulic cylinder is operating, and preventing external impurities and dust from entering the hydraulic system.

[0021] 5. The fiber cartilage adopts the material of polyester fiber to ensure the strength and corrosion resistance of the fiber hose when it is used inside the hydraulic cylinder.

Brief Description of the Drawings

[0022] Hereinafter, in order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings necessary for the embodiments will be briefly described. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor. [Figure 1] It is an installation view of the operating state of the present invention. [Figure 2] It is a device structure diagram of the present invention. [Figure 3] It is an internal structure diagram of the fiber hose of the present invention. [Figure 4] It is a mounting plan view of the electric winch set inside the base of the present invention. [Figure 5] It is an internal structure diagram of the probe assembly.

Modes for Carrying Out the Invention

[0023] The following describes the technical solutions in embodiments of the present invention clearly and completely with reference to the accompanying drawings, but it is clear that the embodiments described are only a part of the embodiments of the present invention and not all of them. All other embodiments obtained based on the embodiments of the present invention, assuming that a person skilled in the art does not perform any creative work, are within the scope of the protection of the present invention.

[0024] To make the above-mentioned objectives, features, and advantages of the present invention clearer, the present invention will be described in more detail below with reference to the drawings and specific embodiments.

[0025] Referring to Figures 1 to 5, the present invention provides a hydraulic cylinder internal wall corrosion monitoring probe, the hydraulic cylinder is in communication with hydraulic fluid via a liquid inlet, a three-way tube 2 having a first end in communication with the liquid inlet and a second end in communication with hydraulic fluid, a base 1 provided at the third end of the three-way tube 2 and in communication with the third end, housing an electric winch set 1.1 and a controller inside, the electric winch set 1.1 is driven by a DC brushless motor 1.2, the controller is electrically connected to the DC brushless motor 1.2, and one end is in communication with the base 1 and the other end extends into the hydraulic cylinder from the second end, housing a ball inside The fiber hose 3 includes a probe assembly 5, the probe assembly 5 being fixedly attached to the other end of the fiber hose 3, and the probe assembly 5 being connected to a controller. The fiber hose 3 includes a probe assembly 5, the probe assembly 5 being fixedly attached to the other end of the fiber hose 3, and the probe assembly 5 being connected to a controller.

[0026] As shown in Figure 5, the probe assembly 5 includes a probe housing 5.4, which is fixedly connected to the other end of the fiber hose 3 via a connector 4, and the end is sealed by a sealing screw 5.6. The connector 4 is rotatable, on the one hand preventing hydraulic fluid in the hydraulic cylinder from seeping into the probe housing 5.4 and improving sealing performance, and on the other hand, the probe housing 5.4 can be connected and disconnected via the rotating mechanism, facilitating subsequent maintenance and replacement of the probe assembly 5.5. The phased array ultrasonic probe 5.5 has multiple phased array ultrasonic probes 5.5, which are arranged circumferentially within the probe housing 5.4, and the phased array ultrasonic probes 5.5 are arranged away from the connector 4, and each phased array ultrasonic probe 5.5 can cover and monitor a portion of the inner wall of the hydraulic cylinder, and the multiple phased array ultrasonic probes 5.5 are distributed circumferentially to monitor all positions on the inner wall of the hydraulic cylinder collectively, while at the same time the phased array ultrasonic probes 5.5 are away from the connector 4, which reduces the monitoring range of the dead space of the phased array ultrasonic probe 5.5. A data transmission line 3.1 is electrically connected at one end to a phased array ultrasonic probe 5.5, and at the other end to the controller via a hollow shaft in the center of a plurality of ball hinges 3.3. In this embodiment, the data transmission line 3.1 is located in the central part, and there are four traction wires 3.2, which are arranged parallel to the longitudinal direction of the fiber hose 3 via traction holes 3.4 of the ball hinges 3.3. The tensile forces of the different traction wires 3.2 cause the fiber hose 3 to bend in different directions, pulling the probe assembly 5 to precisely control its position within the hydraulic cylinder, so that the phased array ultrasonic probe 5.5 reaches a preset detection position.

[0027] As shown in Figure 5, this embodiment further includes an ultrasonic positioning probe 5.1 and a hydraulic pressure sensor 5.2, which are mounted on an open-seal screw 5.6 on the head of the probe assembly 5 and electrically connected to a data transmission line 3.1. The probe assembly 5 monitors the hydraulic cylinder while it is operating, measuring the hydraulic pressure at the detection position using the ultrasonic positioning probe 5.1 and hydraulic pressure sensor 5.2, and adjusting parameters such as the frequency, power, and pulse width of the phased array ultrasonic probe 5.5 according to the hydraulic pressure obtained from the measurement, so that the phased array ultrasonic probe 5.5 can send and receive signals in the hydraulic fluid, ensuring that the detected thickness data of the hydraulic cylinder inner wall is accurate and improving the corrosion detection effect of the hydraulic cylinder inner wall. In addition, the ultrasonic positioning probe 5.1 can also confirm the position of the piston rod 6 of the hydraulic cylinder and avoid collisions between the probe assembly 5 and the piston rod 6.

[0028] In this embodiment, O-ring seals are provided at the connection point between the base 1 and the third end, and at the communication point between the first end and the liquid inlet, and pressure-resistant packing is filled in. Dust rings are installed at the connection point between the base 1 and the third end, and at the communication point between the first end and the liquid inlet.

[0029] The following describes a method for monitoring corrosion on the inner wall of a hydraulic cylinder in combination with the above-mentioned hydraulic cylinder inner wall corrosion monitoring probe. As shown in Figure 1, the process involves controlling the DC brushless motor 1.2 via a controller to adjust the electric winch set 1.1, thereby adjusting the tensile force of multiple towing wires 3.2 to bend the fiber hose 3 and move the probe assembly 5 into a preset monitoring position within the hydraulic cylinder. The steps include: confirming whether the ultrasonic positioning probe 5.1 has reached a preset monitoring position; The steps include monitoring the hydraulic pressure in the hydraulic cylinder using a hydraulic pressure sensor 5.2 and adjusting the tensile force of multiple traction wires 3.2 according to the monitored hydraulic pressure, The process includes detecting the circumferential thickness of the inner wall of the hydraulic cylinder using a phased array ultrasonic probe 5.5, transmitting the detected thickness data to a controller in base 1 via a data transmission line 3.1, and the controller uploading the thickness data to a PC terminal for recording and analysis. Specifically, the thickness data can be combined using image analysis software on the PC terminal to create an image of the inner wall of the hydraulic cylinder, allowing for intuitive analysis and determination of the corrosion status of the inner wall of the hydraulic cylinder.

[0030] In the description of this invention, the orientations or positional relationships indicated by terms such as "vertical," "horizontal," "up," "down," "front," "back," "left," "right," "perpendicular," "horizontal," "top," "bottom," "inside," and "outside" are based on the orientations or positional relationships shown in the drawings and are intended solely to facilitate the description of this invention. They are not intended to indicate or imply that the mentioned devices or elements must have a particular orientation, be configured in a particular orientation, or operate in a particular orientation, and therefore should not be construed as limitations of this invention.

[0031] The embodiments described above merely illustrate preferred aspects of the present invention and do not limit the scope of the invention. Various modifications and improvements made by those skilled in the art to address the technical problems of the present invention, without departing from the spirit of the design of the present invention, should be included within the scope of protection defined by the claims of the present invention. [Explanation of symbols]

[0032] 1 Base 2 three-way tube 3 Fiber hose 4 connectors 5. Probe Assembly 6 Piston rods 1.1 Electric Winch Set 1.2 DC Brushless Motor 3.1 Data transmission lines 3.2 Towing wire 3.3 Ball Hinge 3.4 Tow hole 5.1 Ultrasonic positioning probe 5.2 Water pressure sensor 5.3 Data transmission lines 5.4 Probe Housing 5.5 Phased Array Ultrasound Probes 5.6 Sealed Screw

Claims

1. A hydraulic cylinder inner wall corrosion monitoring probe, wherein the hydraulic cylinder is in communication with hydraulic fluid via a fluid inlet, A three-way pipe (2) whose first end communicates with the liquid inlet and whose second end communicates with the hydraulic fluid, A base (1) is provided at the third end of the three-way pipe (2), communicates with the third end, and houses an electric winch set (1.1) and a controller inside, with the controller electrically connected to the electric winch set (1.1). A fiber hose (3) having one end communicating with the base (1) and the other end extending from the second end into the hydraulic cylinder, with a ball hinge (3.3) and a plurality of towing wires (3.2) fixedly provided inside the fiber hose (3), with a plurality of ball hinges (3.3) arranged along the length of the fiber hose (3), with towing holes (3.4) provided through the connection portion of each ball hinge (3.3) that connects to an adjacent ball hinge (3.3), the towing wires (3.2) passing through the plurality of towing holes (3.4) in sequence, one end extending into the base (1) and connected to the electric winch set (1.1), and the fixed end of the towing wires (3.2) provided close to the other end, A hydraulic cylinder internal wall corrosion monitoring probe, comprising a probe assembly (5), wherein the probe assembly (5) is fixedly attached to the other end of the fiber hose (3), and the probe assembly (5) is communicated with the controller.

2. The probe assembly (5) is A probe housing (5.4) is fixedly connected to the other end of the fiber hose (3) via a connector (4), There are multiple phased array ultrasonic probes (5.5) provided within the probe housing (5.4) along the circumferential direction, A hydraulic cylinder internal wall corrosion monitoring probe according to claim 1, comprising a data transmission line (3.1), wherein one end of the data transmission line (3.1) is electrically connected to the phased array ultrasonic probe (5.5), and the other end is electrically connected to the controller through a hollow shaft in the center of a plurality of ball hinges (3.3).

3. A hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, further comprising an ultrasonic positioning probe (5.1) and a hydraulic pressure sensor (5.2), wherein the ultrasonic positioning probe (5.1) and the hydraulic pressure sensor (5.2) are provided on the head of the probe housing (5.4) and are electrically connected to the data transmission line (3.1).

4. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, characterized in that the phased array ultrasonic probe (5.5) is provided away from the connector (4).

5. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 2, characterized in that the connector (4) is rotatable.

6. The hydraulic cylinder inner wall corrosion monitoring probe according to claim 1, characterized in that the fiber hose (3) is made of polyester fiber material.

7. A hydraulic cylinder inner wall corrosion monitoring probe according to claim 1, characterized in that an O-ring seal is provided at the connection point between the base (1) and the third end and at the communication point between the first end and the liquid inlet, and a pressure-resistant packing is filled therein.

8. A hydraulic cylinder inner wall corrosion monitoring probe according to claim 7, characterized in that a dust ring is provided at the connection point between the base (1) and the third end and at the communication point between the first end and the liquid inlet.

9. A method for monitoring corrosion of the inner wall of a hydraulic cylinder, wherein a hydraulic cylinder inner wall corrosion monitoring probe described in any one of claims 1 to 8 is applied. The steps include adjusting the electric winch set (1.1) to adjust the tensile force of multiple towing wires (3.2) to bend the fiber hose (3) and move the probe assembly (5) into a preset monitoring position in the hydraulic cylinder, The steps include: confirming whether the ultrasonic positioning probe (5.1) has reached a preset monitoring position; The steps include monitoring the hydraulic pressure in the hydraulic cylinder using a hydraulic pressure sensor (5.2) and adjusting the tensile force of the multiple traction wires (3.2) according to the monitored hydraulic pressure, A method characterized by including the steps of detecting the circumferential thickness of the inner wall of a hydraulic cylinder using a phased array ultrasonic probe (5.5), transmitting the detected thickness data to a controller in a base (1) via a data transmission line (3.1), and the controller uploading the thickness data to a PC terminal for recording and analysis.

Images